Formerly tax-free

[HW \Skip\ Weldon]

I am wary of making long-range plans based on the tax code. Reason:
Some things that were originally income tax-free that changed over
time.

For example, Social Security has gradually become more taxable.
Municipal bonds now are figured into Social Security for tax purposes.
As income rises beyond a certain point, we lose the value of
deductions.

I suspect there are several others. If you know of one or more,
please list them below.

-HW "Skip" Weldon
Columbia, SC